As discussed in the last section of my security-related blog post from last month – as linked to from the forums here – the team decided to move the FreePBX 15 End Of Life date from September to October, but fret not 
if you haven’t updated yet because we recently broke out a reserve maple syrup jar 
full of sweet, low-glycemic upgrade tips in our Get Lean with 17: Moving on From FreePBX 15 webinar with YT @penguinpbx and @tmilbrand.
The wiki’s full calendar of FreePBX Versions – currently from v15 on-wards, including future roadmap planning projections, first linked from the forums in early 2025 – will be was updated automatically to reflect the change 2025-10-01T07:00:00Z on which day v15 “will no longer receive changes of any kind.” (Historical observers may appreciate this similar blog notice regarding v13 and v14 from 2022-11-02T06:00:00Z.)
EDIT: It happened!